JP3477580B2 - Belt conveyor - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt conveyor in which a part of an endless belt-shaped conveyor belt is rolled into a pipe shape and conveyed.

[0002]

2. Description of the Related Art FIGS. 4 and 5 show an example of a conventional belt conveyor of this type.

In this conventional belt conveyor, an endless belt-shaped conveyor belt (1) is wound around a front roller (2) and a rear roller (3) to form a front roller (2) and a rear roller (3). One of the rollers is rotated by a driving means (not shown) such as a motor to circulate the conveyor belt (1), and both rollers are rotated.
(2) A large number of support frames (4) are installed at appropriate intervals along the traveling direction of the conveyor belt (1) between (3) and each support frame (4).
A plurality of supporting rollers (5) for supporting the outward side portion (1a) of the conveyor belt (1) in a flat or shallow gutter shape are provided on the upper part of the supporting belt (1), and a plurality of shape keeping rollers are provided on the lower part of the supporting frame (4). (6) is provided so that the front shape is substantially circular as a whole, and the return path side portion (1b) of the conveyor belt (1) passes between the shape-retaining rollers (6) arranged in a circle. By doing so, the conveying surface is rolled inward and rolled in a pipe shape.

The object to be conveyed supplied from the supply hopper (7)
(8) is received by the forward path side portion (1a) of the flat belt-shaped or gutter-shaped transport belt (1), is transported to the discharge hopper (9), and is dropped on the discharge hopper (9). .

By passing the return path side portion (1b) of the conveyor belt (1) between a plurality of shape-retaining rollers (6) arranged in a circle, the conveyor surface is inwardly rolled into a pipe shape and rotated. The reason for this is to prevent the transported object (8) attached to the transportation surface from falling unintentionally on the return path.

A configuration similar to this is disclosed in, for example, Japanese Patent Laid-Open No. 59-149.
No. 211 is also disclosed.

[0007]

In this type of belt conveyor, when the conveyor belt (1) is rolled into a pipe shape, the conveyor belt (1) is uniformly bent without buckling and has a shape close to a perfect circle. In addition, a high-priced exclusive belt with a belt structure different from that of a general flat belt was used.

For this reason, when a general flat belt conveying line is modified so that the conveyed object adhered to the conveying surface in the returning path is rolled into a pipe shape so as not to fall unintentionally, it has been used until then. The flat belt had to be replaced with a dedicated belt as described above, which was expensive and uneconomical. Further, in the conventional type belt conveyor as described above, the diameter of the inscribed circle formed by the shape-retaining rollers could not be changed. It has not been possible to deal with this, such as when the flexibility changes or when it is desired to use a flat belt of a different size. That is,
In the conventional one, when the belt is rolled into a cylindrical shape, the flexibility of the belt is not uniform and changes locally,
Or, if the flexibility of the belt in the circumferential direction is uneven due to the existence of overlapping parts of the belt ends, the contact state between the belt and the shape retention roller will be uneven, and uneven wear on the belt and rollers will occur. However, there is a problem that the conventional flat belt conveyor cannot be effectively used.

Even when a dedicated belt is used, the flexibility of the belt differs between when it is used in a cold region and when it is used in a high temperature region, and when it is rolled, the most desirable belt diameter, that is, the optimum diameter changes. . Further, there are cases where it is desired to properly use a plurality of types of belts having different widths depending on the material and amount of the transported object.

In view of the above problems of the prior art, the present invention determines the diameter of the belt when a part of the conveyor belt is rolled into a pipe shape, depending on the use conditions, the material of the belt and other conditions. By making it possible to adjust arbitrarily,
It is an object of the present invention to solve the above-mentioned problems and to provide a belt conveyor which can be used also for a type in which an existing flat belt is partially rotated in a pipe shape.

[0011]

To achieve the above object, according to the present invention, a plurality of circulating endless belt-shaped conveyor belts are supported by a support frame so as to form a substantially circular arrangement as a whole. By passing between shape retention rollers,
In a belt conveyor in which a part of a conveyor belt is rolled into a pipe shape and rotated, a shape-maintaining roller at a lower center of the shape-maintaining rollers is vertically adjusted with respect to a shape-maintaining roller at an upper center. If possible, attach it to the support frame and attach it to the left and right ends of the shape-maintaining roller shaft in the lower center.
Of the shape-keeping roller, and the left and right shape-holding rollers
The pin penetrating the outer end of the shaft of the roller
Move inward and outward in conjunction with the rise and fall of the slider
The long hole that is long in the vertical direction is provided on the moving body.
It is characterized in that it is movably fitted .

[0012]

When the lower center shape-keeping roller is lowered, the left and right shape-maintaining rollers are tilted so as to increase their included angle with respect to the lower center shape-maintaining roller, and the shape-holding rollers are tilted. The inscribed circle formed by the shaped roller is large.

On the contrary, when the shape-retaining roller at the lower center is raised, the inscribed circle formed by the shape-retaining roller becomes small due to the effect opposite to the above.

[0014]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 3 show an embodiment of the present invention.
Members common to those of the conventional belt conveyors shown in FIGS. 4 and 5 are designated by the same reference numerals, and detailed description thereof will be omitted.

In this embodiment, the fixed frame (31) is fixed to the lower surface of the support frame (4), and the movable frame (33) is slidably fitted in the fixed frame (31) in the vertical direction. And movable frame (33)
A long hole (not shown) that is long in the vertical direction and is drilled on both sides
And a nut (16) that inserts a shaft hole (not shown) formed on both sides of the fixed frame (31) into the fixed frame (11) at a desired vertical position. Is done.

In this embodiment, the shape-retaining roller is also used.
The number of (6) is 6, and the shaft of the shape-maintaining roller (6-1) at the center of the upper part
Fix both ends of (6-1a) to the fixed frame (31) with the shaft (32) facing the front-back direction, and the left and right shape-retaining rollers (6-2) adjacent to it.
The inner ends of the shafts (6-2a) and (6-3a) of (6-3) are pivotally attached to the shafts (32) respectively, and the shaft (6-4a) of the shape-maintaining roller (6-4) in the lower center is pivoted. ) Fixed to the movable frame (33) with the shaft (34) facing the front-back direction, and the left and right shape-maintaining rollers (6-5) (6-6) adjacent to the shape-maintaining roller (6-4). The inner ends of the shafts (6-5a) (6-6a) are pivotally attached to the shaft (34).

The left shape-maintaining roller (6-2) (6-5) shaft (6-2a) (6
-5a) a pair of upper and lower pins that extend through the outer end and face in the front-back direction
(35) and the right shape-maintaining roller (6-3) (6-6) shaft (6-3a) (6-6
a) A pair of upper and lower pins (3
5) are slidably fitted in vertically elongated long holes (37) provided at the inner ends of the pair of left and right moving bodies (36), and the outer end portions of the respective moving bodies (36) are The pin (38) protruding from the fixed frame (31)
The movable frame (33) is lowered by fitting into the elongated holes (39) (40) provided so as to intersect with the movable frame (33) in an X shape. ) And the moving body (36) are moved outward, whereby the left and right shape keeping rollers (6-2) are moved.
The outer ends of (6-3), (6-5), and (6-6) can be moved so as to spread vertically.

Therefore, as shown in FIG. 3, when the shape-maintaining roller (6-4) in the lower center is lowered, it interlocks with it,
Left and right shape-maintaining rollers (6-2) (6-3) (6-5) (6-6) increase their included angle with respect to the center shape-maintaining rollers (6-1) (6-4). As a result, the inscribed circle formed by these six shape-maintaining rollers becomes large.

On the contrary, as shown in FIG. 2, when the shape-maintaining roller (6-4) at the lower center is raised, the inscribed circle formed by the six shape-maintaining rollers is produced by the action opposite to the above. Is small.

Therefore, in this embodiment, the bolt (15) and the nut (16) are loosened to move the movable frame (33) up and down to an arbitrary height, and at that position, the bolt (15) and the nut (16). ) And fixing the movable frame (33) to the fixed frame (31), the diameter of the inscribed circle formed by the six shape-retaining rollers (6) can be freely changed, As a result, the diameter of the pipe on the return path side portion (1b) of the conveyor belt (1), which is rounded into a pipe shape by passing through the six shape-maintaining rollers (6), is increased as shown in FIG. , Or as shown in FIG. 1 and FIG. 2, it can be freely changed.

As a result, based on the material and width of the conveyor belt (1), the conditions of use, other conditions, etc.
The diameter of the part that is rolled into a pipe in (1) can be adjusted to the optimum value at each time, and it is possible to use the existing conventional flat belt as it is as this type of conveyor belt (1). Becomes

The above embodiment is a conveyor belt according to the present invention.
The present invention is applied to a type in which the return path side portion (1b) of (1) is rolled into a pipe shape, but the present invention is a type in which the forward path side portion (1a) of the conveyor belt (1) is rolled into a pipe shape. Alternatively, the invention can be applied to a type in which both the forward path side portion (1a) and the backward path side portion (1b) are rolled into a pipe shape.

[0023]

According to the present invention, the diameter of the inscribed circle formed by the shape-retaining rollers is changed by changing the mounting position of at least one of the shape-retaining rollers supported by the support frame. The diameter of the portion of the conveyor belt that is rolled into a pipe can be adjusted to the optimum value at that time based on the material and width of the conveyor belt, usage conditions, and other conditions. It is possible,
The device can be operated in an optimal state with less wear and the like, and it can be used as a conventional existing flat belt as it is, with a part rolled into a pipe shape and running around, which is significant. .

Further, in the present invention, when the shape-retaining roller at the center of the lower part is lowered, the shape-retaining rollers on the left and right thereof increase their included angle with respect to the shape-maintaining roller at the center of the lower part. And the inscribed circle formed by these shape-maintaining rollers becomes large, and conversely, when the shape-maintaining roller in the lower center is raised, the inner shape formed by the shape-maintaining rollers is reversed due to the opposite action. The contact circle becomes small.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of an embodiment of the present invention.

FIG. 2 is likewise an enlarged vertical sectional front view of the main part of FIG.

FIG. 3 is likewise a vertical cross-sectional front view of a main part when the diameter of the rolled portion of the conveyor belt is increased.

FIG. 4 is a schematic side view showing an example of a conventional pipe conveyor.
Is.

5 is an enlarged cross-sectional view taken along the line BB of FIG.

[Explanation of symbols]

(1) Conveyor belt (1a) Forward belt (1b) Return belt (2) Front roller (3) Rear roller (4) Support frame (5) Support roller (6) (6-1) (6-2) ( 6-3) (6-4) (6-5) (6-6) Shape-maintaining roller (6a) (6-1a) (6-2a) (6-3a) (6-4a) (6-5a) (6-6a) Shaft (7) Supply hopper (8) Transported object (9) Discharge hopper (15) Bolt (16) Nut (31) Fixed frame (32) Shaft (33) Movable frame (34) Shaft (35) ) Pin (36) Moving body (37) Long hole (38) Pin (39) (40) Long hole

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Claims (2)

(57) [Claims] 1. A part of a circulating endless belt-shaped conveyor belt is passed between a plurality of shape-retaining rollers supported by a support frame so as to form a substantially circular arrangement as a whole,
A belt conveyor in which a part of a conveyor belt is rolled into a pipe shape and rotated, and the shape-maintaining roller at the lower center of the shape-maintaining rollers is vertically adjusted with respect to the shape-maintaining roller at the upper center. as possible, as well as attached to the support frame, the bottom center of the shape retention
Align the inner ends of the left and right shape-maintaining roller shafts on both ends of the roller shaft.
Pivotally attached and penetrated through the outer ends of the left and right shape keeping roller shafts.
The pin is linked to the rise and fall of the shape-maintaining roller at the bottom center.
Installed on a moving body that is designed to move inward and outward
A belt conveyor characterized in that it is slidably fitted in a long hole that is long in the vertical direction . 2. A long portion is provided at a portion where a fixed frame fixed to a support frame and a movable frame which is mounted on the fixed frame so as to be vertically positionally adjustable and to which a shaft of a shape-maintaining roller at a lower center is fixed. Holes are provided so as to intersect with each other in an X shape, and a pin protruding from the outer end portion of the moving body is fitted into both of the long holes, so that the moving body has in conjunction with the up and down, and to move inward and outward 請
The belt conveyor according to claim 1 .